Pump assembly with a removable cover assembly

ABSTRACT

An infusion pump assembly includes an enclosure assembly. A reservoir assembly is positioned at least partially within the enclosure assembly and is configured to contain an infusible fluid. A pump assembly is positioned at least partially within the enclosure assembly and is configured to effectuate the dispensing of the infusible fluid contained within the reservoir assembly. Processing logic is positioned at least partially within the enclosure assembly and is configured to control the pump assembly. A removable cover assembly is configured to releasably engage the enclosure assembly. A combination of the removable cover assembly and at least a portion of the enclosure assembly defines a power supply cavity configured to prevent a removable power supply assembly from being reverse-polarity electrically coupled to the processing logic.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.16/004,946, filed on Jun. 11, 2018, which is a continuation of U.S.patent application Ser. No. 14/922,813 filed on Oct. 26, 2015, which isa continuation of U.S. patent application Ser. No. 13/858,587 filed onApr. 8, 2013, which is a continuation of U.S. patent application Ser.No. 13/230,110 filed on Sep. 12, 2011, which is a continuation of U.S.patent application Ser. No. 12/249,496 filed on Oct. 10, 2008, each ofwhich is hereby incorporated by reference herein in its entirety.

TECHNICAL FIELD

This disclosure relates to infusion pump assemblies and, moreparticularly, to infusion pump assemblies that include serviceablebattery assemblies.

BACKGROUND

An infusion pump assembly may be used to infuse a fluid (e.g., amedication or nutrient) into a user. The fluid may be infusedintravenously (i.e., into a vein), subcutaneously (i.e., into the skin),arterially (i.e., into an artery), and epidurally (i.e., into theepidural space).

Infusion pump assemblies may administer fluids in ways that would beimpractically expensive/unreliable if performed manually by nursingstaff. For example, an infusion pump assembly may repeatedly administersmall quantities of an infusible fluid (e.g., 0.1 mL per hour), whileallowing the user to request one-time larger “bolus” doses.

SUMMARY OF DISCLOSURE

In a first implementation, an infusion pump assembly includes anenclosure assembly. A reservoir assembly is positioned at leastpartially within the enclosure assembly and is configured to contain aninfusible fluid. A pump assembly is positioned at least partially withinthe enclosure assembly and is configured to effectuate the dispensing ofthe infusible fluid contained within the reservoir assembly. Processinglogic is positioned at least partially within the enclosure assembly andis configured to control the pump assembly. A removable cover assemblyis configured to releasably engage the enclosure assembly. A combinationof the removable cover assembly and at least a portion of the enclosureassembly defines a power supply cavity configured to prevent a removablepower supply assembly from being reverse-polarity electrically coupledto the processing logic.

One or more of the following features may be included. The removablecover assembly may be configured to allow access to the power supplycavity and effectuate removable insertion of the removable power supplyassembly into the power supply cavity. The removable power supplyassembly may include a battery.

The removable cover assembly may include a sealing assembly forreleasably engaging at least a portion of the enclosure assembly andforming an essentially water-tight seal between the removable coverassembly and the enclosure assembly. The sealing assembly may include ano-ring assembly. The removable cover assembly may include a conductorassembly configured to electrically couple the removable cover assemblywith an interior wall of the power supply cavity.

The removable cover assembly may include a first twist lock assembly.The enclosure assembly may include a second twist lock assemblyconfigured to releasably engage the first twist lock assembly andeffectuate the releasable engagement of the removable cover assembly andthe enclosure assembly.

In another implementation, an infusion pump assembly includes anenclosure assembly. A reservoir assembly is positioned at leastpartially within the enclosure assembly and is configured to contain aninfusible fluid. A pump assembly is positioned at least partially withinthe enclosure assembly and is configured to effectuate the dispensing ofthe infusible fluid contained within the reservoir assembly. Processinglogic is positioned at least partially within the enclosure assembly andis configured to control the pump assembly. A removable cover assemblyis configured to releasably engage the enclosure assembly. The removablecover assembly includes a sealing assembly for releasably engaging atleast a portion of the enclosure assembly and forming an essentiallywater-tight seal between the removable cover assembly and the enclosureassembly. A combination of the removable cover assembly and at least aportion of the enclosure assembly define a power supply cavityconfigured to allow removable insertion of a removable power supplyassembly.

One or more of the following features may be included. The removablecover assembly may be configured to allow access to the power supplycavity and effectuate removable insertion of the removable power supplyassembly into the power supply cavity. The removable power supplyassembly may include a battery. The sealing assembly may include ano-ring assembly.

The removable cover assembly may include a conductor assembly configuredto electrically couple the removable cover assembly with an interiorwall of the power supply cavity. The removable cover assembly mayinclude a first twist lock assembly. The enclosure assembly may includea second twist lock assembly configured to releasably engage the firsttwist lock assembly and effectuate the releasable engagement of theremovable cover assembly and the enclosure assembly.

In another implementation, an infusion pump assembly includes anenclosure assembly. A reservoir assembly is positioned at leastpartially within the enclosure assembly and is configured to contain aninfusible fluid. A pump assembly is positioned at least partially withinthe enclosure assembly and is configured to effectuate the dispensing ofthe infusible fluid contained within the reservoir assembly. Processinglogic is positioned at least partially within the enclosure assembly andis configured to control the pump assembly. A removable cover assembly,which is configured to releasably engage the enclosure assembly,includes a first twist lock assembly. A combination of the removablecover assembly and at least a portion of the enclosure assembly define apower supply cavity configured to allow removable insertion of aremovable power supply assembly. The enclosure assembly includes asecond twist lock assembly configured to releasably engage the firsttwist lock assembly and effectuate the releasable engagement of theremovable cover assembly and the enclosure assembly.

One or more of the following features may be included. The removablecover assembly may be configured to allow access to the power supplycavity and effectuate removable insertion of the removable power supplyassembly into the power supply cavity. The removable power supplyassembly may include a battery. The removable cover assembly may includea conductor assembly configured to electrically couple the removablecover assembly with an interior wall of the power supply cavity.

In another implementation, an infusion pump assembly includes anenclosure assembly. A reservoir assembly is positioned at leastpartially within the enclosure assembly and is configured to contain aninfusible fluid. A pump assembly is positioned at least partially withinthe enclosure assembly and is configured to effectuate the dispensing ofthe infusible fluid contained within the reservoir assembly. Processinglogic is positioned at least partially within the enclosure assembly andis configured to control the pump assembly. A removable cover assemblyis configured to releasably engage the enclosure assembly. A combinationof the removable cover assembly and at least a portion of the enclosureassembly defines a power supply cavity configured to allow removableinsertion of the removable power supply assembly. The removable coverassembly includes a conductor assembly configured to electrically couplethe removable cover assembly with an interior wall of the power supplycavity.

One or more of the following features may be included. The removablecover assembly may be configured to allow access to the power supplycavity and effectuate removable insertion of the removable power supplyassembly into the power supply cavity. The removable power supplyassembly may include a battery.

The details of one or more implementations are set forth in theaccompanying drawings and the description below. Other features andadvantages will become apparent from the description, the drawings, andthe claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagrammatic view of an infusion pump assembly;

FIG. 2 is a front view of the infusion pump assembly of FIG. 1;

FIG. 2L is a left-side view of the infusion pump assembly of FIG. 2;

FIG. 2R is a right-side view of the infusion pump assembly of FIG. 2;

FIG. 3 is an isometric view of the infusion pump assembly of FIG. 2;

FIG. 4 is an isometric view of a removable cover assembly for use withthe infusion pump assembly of FIG. 2;

FIG. 5 is an alternative isometric view of the removable cover assemblyof FIG. 4;

FIG. 6 is a cross-sectional view of the removable cover assembly of FIG.4;

FIG. 7 is an alternative isometric view of the removable cover assemblyof FIG. 4; and

FIG. 8A-8D are isometric views of an alternative embodiment of theremovable cover assembly of FIG. 4.

Like reference symbols in the various drawings indicate like elements.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIG. 1, there is shown in infusion pump assembly 10 thatmay be configured to deliver infusible fluid 12 to user 14. As discussedabove, infusible fluid 12 may be delivered intravenously (i.e., into avein), subcutaneously (i.e., into the skin), arterially (i.e., into anartery), and epidurally (i.e., into the epidural space). Examples ofinfusible fluid 12 may include but are not limited to insulin,nutrients, saline solution, antibiotics, analgesics, anesthetics,hormones, vasoactive drugs, and chelation drugs, and any othertherapeutic fluids.

Infusion pump assembly 10 may include processing logic 16 that executesone or more processes that may be required for infusion pump assembly 10to operate properly. Processing logic 16 may include one or moremicroprocessors (not shown), one or more input/output controllers (notshown), and cache memory devices (not shown). One or more data busesand/or memory buses may be used to interconnect processing logic 16 withone or more subsystems.

Examples of the subsystems interconnected with processing logic 16 mayinclude but are not limited to memory system 20, input system 22,display system 24, vibration system 26, audio system 28, motor assembly30, force sensor 32, and displacement detection device 34. Infusion pumpassembly 10 may include removable power supply assembly 36 (e.g. abattery) for providing electrical power to at least a portion ofprocessing logic 16 and one or more of the subsystems (e.g., memorysystem 20, input system 22, display system 24, vibration system 26,audio system 28, motor assembly 30, force sensor 32, and displacementdetection device 34).

Infusion pump assembly 10 may include reservoir assembly 38 configuredto contain infusible fluid 12. In some embodiments, the reservoirassembly 38 may be a reservoir assembly similar to that described inU.S. Patent Application Publication No. US 2004-0135078-A1, publishedJul. 15, 2004, which is herein incorporated by reference in itsentirety. In other embodiments, the reservoir assembly may be anyassembly in which fluid may be acted upon such that at least a portionof the fluid may flow out of the reservoir assembly, for example, thereservoir assembly, in various embodiments, may include but is notlimited to: a barrel with a plunger, a cassette or a container at leastpartially constructed of a flexible membrane.

Plunger assembly 40 may be configured to displace infusible fluid 12from reservoir assembly 38 through cannula assembly 42 so that infusiblefluid 12 may be delivered to user 14. In this particular embodiment,plunger assembly 40 is shown to be displaceable by partial nut assembly44, which may engage lead screw assembly 46 that may be rotatable bymotor assembly 30 in response to signals received from processing logic16. In this particular embodiment, the combination of motor assembly 30,plunger assembly 40, partial nut assembly 44, and lead screw assembly 46may form a pump assembly that effectuates the dispensing of infusiblefluid 12 contained within reservoir assembly 38. An example of partialnut assembly 44 may include but is not limited to a nut assembly that isconfigured to wrap around lead screw assembly 46 by e.g., 30 degrees. Insome embodiments, the pump assembly may be similar to one described inU.S. Pat. No. 7,306,578 issued Dec. 11, 2007 which is hereinincorporated by reference in its entirely.

During operation of infusion pump assembly 10, infusible fluid 12 may bedelivered to user 14 in accordance with e.g. a defined deliveryschedule. For illustrative purposes only, assume that infusion pumpassembly 10 is configured to provide 0.00025 mL of infusible fluid 12 touser 14 every three minutes. Accordingly, every three minutes,processing logic 16 may provide the appropriate drive signals to motorassembly 30 to allow motor assembly 30 to rotate lead screw assembly 46the appropriate amount so that partial nut assembly 44 (and thereforeplunger assembly 40) may be displaced the appropriate amount in thedirection of arrow 48 so that 0.00025 mL of infusible fluid 12 areprovided to user 14 (via cannula 42). It should be understood that thevolume of infusible fluid 12 that may be provided to user 14 may varybased upon, at least in part, the nature of the infusible fluid (e.g.,the type of fluid, concentration, etc.), use parameters (e.g., treatmenttype, dosage, etc.), as well as various other factors that will beunderstood by one having skill in the art. As such, the foregoingillustrative example should not be construed as a limitation of thepresent disclosure.

Force sensor 32 may be configured to provide processing logic 16 withdata concerning the force required to drive plunger assembly 40 intoreservoir assembly 38. Force sensor 32 may include one or more straingauges and/or pressure sensing gauges and may be positioned betweenmotor assembly 30 and an immovable object (e.g. bracket assembly 50)included within infusion pump assembly 10.

In one embodiment, force sensor 32 includes four strain gauges (notshown), such that: two of the four strain gauges are configured to becompressed when driving plunger 40 into reservoir assembly 38; and twoof the four strain gauges are configured to be stretched when drivingplunger 40 into reservoir assembly 38. The four strain gauges (notshown) may be connected to a Wheatstone Bridge (not shown) that producesan analog force signal (not shown) that is a function of the pressuresensed by force sensor 32. The analog force signal (not shown) producedby force sensor 32 may be provided to an analog-to-digital converter(not shown) that may convert the analog force signal (not shown) into adigital force signal (not shown) that may be provided to processinglogic 16. An amplifier assembly (not shown) may be positioned prior tothe above-described analog-to-digital converter and may be configured toamplify the output of e.g., force sensor 32 to a level sufficient to beprocessed by the above-described analog-to-digital converter.

Motor assembly 30 may be configured as e.g., a brush-type DC electricmotor. Further, motor assembly 30 may include a reduction gear assembly(not shown) that e.g. requires motor assembly 30 to rotatethree-thousand revolutions for each revolution of lead screw assembly46, thus increasing the torque and resolution of motor assembly 30 by afactor of three-thousand.

As discussed above, infusion pump assembly 10 may be configured todeliver infusible fluid 12 to user 14. Infusible fluid 12 may bedelivered to user 14 via one or more different infusion event types. Forexample, infusion pump assembly 10 may deliver infusible fluid 12 via asequential, multi-part, infusion event (that may include a plurality ofdiscrete infusion events) and/or a one-time infusion event.

Examples of such a sequential, multi-part, infusion event may includebut are not limited to a basal infusion event and an extended-bolusinfusion event. As is known in the art, a basal infusion event refers tothe repeated injection of small (e.g. 0.05 unit) quantities of infusiblefluid 12 at a predefined interval (e.g. every three minutes) that isrepeated. Further, the basal infusion rates may be pre-programmed andmay include specified rates for pre-programmed time-frames, e.g., a rateof 0.50 units per hour from 6 am-3 pm; a rate of 0.40 units per hourfrom 3 pm-10 pm; and a rate of 0.35 units per hour from 10 pm-6 am.However, similarly, the basal rate may be 0.025 units per hour, and maynot change according to pre-programmed time-frames. The basal rates maybe repeated regularly/daily until otherwise changed.

Further and as is known in the art, an extended-bolus infusion eventrefers to the repeated injection of small (e.g. 0.025 unit) quantitiesof infusible fluid 12 at a predefined interval (e.g. every threeminutes) that is repeated for a defined number of intervals (e.g., threeintervals) or for a defined period of time (e.g., one hour). Anextended-bolus infusion event may occur simultaneously with a basalinfusion event.

In contrast, as is known in the art, a normal bolus infusion eventrefers to a one-time infusion of infusible fluid 12. The volume of theinfusible fluid 12 delivered in a bolus infusion event may be requested,and infusion pump assembly 10 may deliver the requested volume ofinfusible fluid 12 for the bolus infusion event at a predetermined rate(e.g., as quickly as the infusion pump assembly can deliver). However,the infusion pump assembly may deliver a normal bolus at a slower ratewhere the normal bolus volume is greater than a pre-programmedthreshold.

Referring also to FIGS. 2, 2L, 2R & 3, the above-described components ofinfusion pump assembly 10 may be included within enclosure assembly 100.Enclosure assembly 100 may be configured so that display system 24 isvisible by user 14 through enclosure assembly 100. One or more switchassemblies/input devices 102, 104, 106 (included within input system 22)may be positioned about various portions of enclosure assembly 100.Enclosure assembly 100 may include infusion port assembly 108 to whichcannula assembly 42 may be releasably coupled. A combination ofremovable cover assembly 110 and a portion of enclosure assembly 100 maydefine power supply cavity 112 (shown in phantom on FIG. 2).

Referring also to FIGS. 4-6, power supply cavity 112 (which is formed bya combination of removable cover assembly 110 and a portion of enclosureassembly 100) may be configured to releasably receive removable powersupply assembly 36. Additionally, power supply cavity 112 may beconfigured to prevent removable power supply assembly 36 from beingreverse-polarity electrically coupled to processing logic 16. Forexample, power supply cavity 112 may be configured to prevent positiveterminal 150 of removable power supply assembly 36 from beingelectrically coupled to negative terminal 152 of power supply cavity 112and/or negative terminal 154 of removable power supply 36 from beingelectrically coupled to positive terminal 156 of power supply cavity112).

Configuring power supply cavity 112 to prevent removable power supply 36from being reverse-polarity electrically coupled to processing logic 16may provide various benefits. For example, the configuration may preventthe loss of power from the removable power supply assembly 36 (e.g.,discharge of the battery) where the removable power supply assembly 36has been inserted incorrectly. In addition to functioning to not wastepower, this configuration may also be a safety feature to infusion pumpassembly 10. Infusion pump assembly 10 may rely on power forfunctionality. A user may rely on infusion pump assembly 10 to providelife-sustaining therapy, for example, by delivering insulin. Thus,preventing removable power supply assembly 36 from beingreverse-polarity electrically coupled to processing logic 16 (e.g., as aresult of user 14 having mistakenly inserted removable power supplyassembly 36 incorrectly), preventing removable power supply 36 frombeing reverse-polarity electrically coupled to processing logic 16 mayallow infusion pump assembly 10 to function for a longer time than ifthe incorrectly installed removable power supply assembly 36 had beenable to be reverse-polarity electrically coupled to processing logic 16.

Removable cover assembly 110 may be configured to allow access to powersupply cavity 112 and effectuate the installation/replacement/removal ofremovable power supply assembly 36. As discussed above, an example ofremovable power supply assembly 36 may include but is not limited to abattery. In some embodiments, the battery may include, but is notlimited to, an A, AA, AAA or AAAA battery, and the battery may be alithium battery or alkaline battery. The battery may, in someembodiments, be a rechargeable battery.

Removable cover assembly 110 may be configured to rotatably engageenclosure assembly 100 in the direction of arrow 158. For example,removable cover assembly 110 may include first twist lock assembly 160(e.g., a protruding tab). Enclosure assembly 100 may include a secondtwist lock assembly 162 (e.g., a slot) configured to releasably engagefirst twist lock assembly and effectuate the releasable engagement ofthe removable cover assembly and the enclosure assembly.

While removable cover assembly 110 and enclosure assembly 100 isdescribed above as including first twist lock assembly 160 and secondtwist lock assembly 162, this is for illustrative purposes only and isnot intended to be a limitation of this disclosure, as otherconfigurations are possible and are considered to be within the scope ofthis disclosure. For example, one or more thread assemblies (not shown)may be utilized to effectuate the above-described rotatable engagement.

Further, while removable cover assembly 110 is described above as beingconfigured to rotatably engage enclosure assembly 100, this is forillustrative purposes only and is not intended to be a limitation ofthis disclosure, as other configurations are possible. For example,removable cover assembly 110 may be configured to slidably engageenclosure assembly 100 (in the direction of arrow 164) using a slideassembly (not shown). Alternatively, removable cover assembly 110 may beconfigured to be pressed into enclosure assembly 100 in the direction ofarrow 166.

Removable cover assembly 110 may include sealing assembly 168 (e.g., ano-ring assembly) that is configured to releasably engage at least aportion of enclosure assembly 100 to form an essentially water-tightseal between removable cover assembly 110 and enclosure assembly 100.

In an embodiment in which sealing assembly 168 includes an o-ringassembly included within removable cover assembly 110, the o-ringassembly may be sized to effectuate a watertight (or essentiallywatertight) seal with a corresponding surface of enclosure assembly 100.

Alternatively, in an embodiment in which sealing assembly 168 includesan o-ring assembly included within enclosure assembly 100, the o-ringassembly may be sized to effectuate a watertight (or essentiallywatertight) seal with a corresponding surface of removable coverassembly 110.

Removable cover assembly 110 may include conductor assembly 170 forelectrically coupling positive terminal 156 of removable cover assembly110 with interior wall 114 of power supply cavity 112. For example,conductor assembly 170 may include a plurality of tabs (e.g., tabs 172,174) that may be electrically coupled to positive terminal 156 ofremovable cover assembly 110. Tabs 172, 174 may be configured so thatwhen removable cover assembly 110 releasably engages enclosure assembly100, tabs 172, 174 may make electrical contact with interior wall 114 ofpower supply cavity 112. Interior wall 114 of power supply cavity 112may then be electrically coupled to the various components withininfusion pump assembly 10 that require electrical power, examples ofwhich may include but are not limited to processing logic 16,

As discussed above, the combination of removable cover assembly 110 anda portion of enclosure assembly 100 may be configured to preventremovable power supply assembly 36 from being reverse-polarityelectrically coupled to processing logic 16. Referring also to FIG. 7,one or more of negative terminal 152 and positive terminal 156 may beconfigured so that the above-described reverse polarity situation cannotoccur. For example, removable cover assembly 110 may include insulatorassembly 175 that includes recess 176 that is sized to receive positiveterminal 150 of removable power supply assembly 36 and enable electricalcontact with positive terminal 156 of removable cover assembly 110.Insulator assembly 175 may be constructed of an insulating material, forexample, but limited to, plastic, for example, but not limited to, PVCplastic or bakelite. Further, recess 176 may be sized so that negativeterminal 154 of removable power supply assembly 36 cannot makeelectrical contact with positive terminal 156 (and may only make contactwith insulator 176), thus preventing removable power supply assembly 36from being electrically coupled to processing logic 16 in areverse-polarity configuration.

Referring also to FIGS. 8A-8D, there is shown an alternative-embodimentremovable cover assembly 110′. Removable cover assembly 110′ may includesealing assembly 168′ (e.g., an o-ring assembly) that is configured toreleasably engage at least a portion of enclosure assembly 100 to forman essentially water-tight seal between removable cover assembly 110′and enclosure assembly 100.

Removable cover assembly 110 may include conductor assembly 170′ forelectrically coupling positive terminal 156′ of removable cover assembly110′ with interior wall 114 (FIG. 2) of power supply cavity 112 (FIG.2). For example, conductor assembly 170′ may include a plurality of tabs(e.g., tabs 172′, 174′) that may be electrically coupled to positiveterminal 156′ of removable cover assembly 110′. Tabs 172′, 174′ may beconfigured so that when removable cover assembly 110′ releasably engagesenclosure assembly 100 (FIG. 2), tabs 172′, 174′ may make electricalcontact with interior wall 114 of power supply cavity 112. Interior wall114 of power supply cavity 112 may then be electrically coupled to thevarious components within infusion pump assembly 10 that requireelectrical power, examples of which may include but are not limited toprocessing logic 16,

As discussed above, the combination of removable cover assembly 110′ anda portion of enclosure assembly 100 may be configured to preventremovable power supply assembly 36 from being reverse-polarityelectrically coupled to processing logic 16. For example, removablecover assembly 110′ may include insulator assembly 175′ that definesrecess 176′ that is sized to receive positive terminal 150 (FIGS. 6-7)of removable power supply assembly 36 (FIGS. 6-7) and enable electricalcontact with positive terminal 156′ of removable cover assembly 110′.Insulator assembly 175′, which may be constructed of an insulatingmaterial (which in some embodiments may include, but is not limited toplastic, which may include, but is not limited to, PVC plastic orbakelite), may be molded into and/or a portion of removable coverassembly 110′. Further, recess 176′ may be sized so that negativeterminal 154 (FIGS. 6-7) of removable power supply assembly 36 cannotmake electrical contact with positive terminal 156′ (and may only makeelectrical contact with insulator 176′, thus preventing removable powersupply assembly 36 from being electrically coupled to processing logic16 in a reverse-polarity configuration.

While power supply cavity 112 is described above as having positiveterminal 156 positioned proximate removable cover assembly 110, this isfor illustrative purposes only and is not intended to be a limitation ofthis disclosure, as other configurations are possible and are consideredto be within the scope of this disclosure. For example, negativeterminal 152 may be positioned proximate removable cover assembly 110.

A number of implementations have been described. Nevertheless, it willbe understood that various modifications may be made. Accordingly, otherimplementations are within the scope of the following claims.

What is claimed is:
 1. An infusion pump assembly comprising: anenclosure assembly; a pump assembly positioned at least partially withinthe enclosure assembly and configured to effectuate the dispensing ofinfusible fluid; processing logic positioned at least partially withinthe enclosure assembly and configured to control the pump assembly; anda removable cover assembly configured to releasably engage the enclosureassembly; wherein a combination of the removable cover assembly and atleast a portion of the enclosure assembly define a power supply cavity,the combination preventing a removable power supply assembly within thepower supply cavity from being reverse-polarity electrically coupled tothe processing logic.
 2. The infusion pump assembly of claim 1 whereinthe removable cover assembly covers an access opening when engaging theenclosure assembly that allows access to the power supply cavity andeffectuates removable insertion of the removable power supply assemblyinto the power supply cavity.
 3. The infusion pump assembly of claim 1wherein the removable power supply assembly includes a battery.
 4. Theinfusion pump assembly of claim 1 wherein the removable cover assemblyincludes: a sealing assembly for releasably engaging at least a portionof the enclosure assembly and forming an essentially water-tight sealbetween the removable cover assembly and the enclosure assembly.
 5. Theinfusion pump assembly of claim 4 wherein the sealing assembly includesan o-ring assembly.
 6. The infusion pump assembly of claim 1 wherein theremovable cover assembly includes: a conductor assembly configured toelectrically couple the removable cover assembly with an interior wallof the power supply cavity.
 7. An infusion pump assembly comprising: anenclosure assembly; a pump assembly positioned at least partially withinthe enclosure assembly and configured to effectuate the dispensing ofinfusible fluid; processing logic positioned at least partially withinthe enclosure assembly and configured to control the pump assembly; anda removable cover assembly configured to releasably engage the enclosureassembly, the removable cover assembly including a sealing assembly forreleasably engaging at least a portion of the enclosure assembly andforming an essentially water-tight seal between the removable coverassembly and the enclosure assembly; wherein a combination of theremovable cover assembly and at least a portion of the enclosureassembly define a power supply cavity configured to allow removableinsertion of a removable power supply assembly, the combinationpreventing the removable power supply assembly within the power supplycavity from being reverse-polarity electrically coupled to theprocessing logic, the power supply cavity having an access opening thatis covered by the removable cover assembly when engaged with theenclosure assembly; and wherein the sealing assembly substantiallysurrounds the access opening.
 8. The infusion pump assembly of claim 7wherein the removable cover assembly is configured to allow access tothe power supply cavity and effectuate removable insertion of theremovable power supply assembly into the power supply cavity.
 9. Theinfusion pump assembly of claim 7 wherein the removable power supplyassembly includes a battery.
 10. The infusion pump assembly of claim 7wherein the sealing assembly includes an o-ring assembly.
 11. Theinfusion pump assembly of claim 7 wherein the removable cover assemblyincludes: a conductor assembly configured to electrically couple theremovable cover assembly with an interior wall of the power supplycavity.
 12. An infusion pump assembly comprising: an enclosure assembly;a pump assembly positioned at least partially within the enclosureassembly and configured to effectuate the dispensing of infusible fluid;processing logic positioned at least partially within the enclosureassembly and configured to control the pump assembly; and a removablecover assembly configured to releasably engage the enclosure assembly,the removable cover assembly including a first twist lock assemblyhaving at least one tab; wherein a combination of the removable coverassembly and at least a portion of the enclosure assembly define a powersupply cavity configured to allow removable insertion of a removablepower supply assembly; and wherein the enclosure assembly includes asecond twist lock assembly having at least one slot configured toreleasably engage the at least one tab of the first twist lock assemblyand effectuate the releasable engagement of the removable cover assemblyand the enclosure assembly.
 13. The infusion pump assembly of claim 12wherein the removable cover assembly is configured to allow access tothe power supply cavity and effectuate removable insertion of theremovable power supply assembly into the power supply cavity.
 14. Theinfusion pump assembly of claim 12 wherein the removable power supplyassembly includes a battery.
 15. The infusion pump assembly of claim 12wherein the removable cover assembly includes: a conductor assemblyconfigured to electrically couple the removable cover assembly with aninterior wall of the power supply cavity.